A fixing device for a CR target reflector

Abstract

A fixing device for a CR target reflector. The present invention relates to the technical field of InSAR-CR monitoring. The present invention aims to solve the problem that the existing installation method of corner reflectors is cumbersome in maintenance and disassembly and replacement because it is installed on a pole tower by means of bolt fixation. It includes a box body, slide rails, a sliding plate and a magnet. Slide rails are fixed on both sides inside the box body, and a sliding plate slides on the slide rails. A magnet is installed at the lower end of the sliding plate; a support column is fixed at the upper end of the sliding plate, and a push plate is fixed at the upper end of the support column. A rotating shaft rotates on the box body, and a cam is fixed on the rotating shaft. The cam contacts the lower end of the push plate and is used to push the push plate upward. The rotating shaft penetrates the box body, and a rotating handle is fixed on the rotating shaft located outside the box body. The present invention is used for quickly installing a corner reflector on a transmission pole tower.

Description

Technical Field

[0001] The present invention relates to the technical field of InSAR-CR monitoring, and particularly relates to a fixing device for a CR target reflector. Background Art

[0002] The northern region is located at the southern edge of the permafrost on the Eurasian continent. It has long and severe winters and warm and rainy summers, resulting in material differentiation and recombination in the surface layer under repeated freezing and thawing, seriously affecting the stability of surface rock formations. With global warming and human engineering disturbances to permafrost, the occurrence of unstable settlement in the transmission line corridors in permafrost areas has also increased. The transmission line foundations are all embedded foundations, which strongly disturb the permafrost and have prominent heat transfer effects. Especially in spring and winter, with the warming of the temperature, adverse permafrost disasters such as thaw settlement are often found on the surface around the transmission line tower bases, causing faults such as tower base settlement, deformation, and pole tilt, seriously affecting the safe operation of transmission lines.

[0003] To detect the settlement of transmission lines, the existing technology uses the surface deformation data obtained by combining the wide-area InSAR technology and the corner reflector target technology. By fusing and comprehensively analyzing the SAR image data of satellites and methods such as field layout of CR points, the large-area settlement of the transmission corridor is truly restored. Therefore, it is necessary to install corner reflectors at key positions in the geological unstable areas of poles and transmission lines and evaluate the environmental conditions. Among them, the corner reflectors need to be maintained and replaced regularly. However, the existing corner reflectors are often installed on poles by bolt fixing, making the later maintenance and replacement operations very cumbersome. Summary of the Invention

[0004] The present invention aims to solve the problem that the maintenance and disassembly and replacement of corner reflectors are cumbersome due to the bolt fixing method for installing the existing corner reflectors on poles, and further provides a fixing device for a CR target reflector to solve the problems raised in the above background art.

[0005] The technical solution of the present invention is as follows:

[0006] A fixing device for a CR target reflector includes a box body, slide rails, a sliding plate, and a magnet. Slide rails are fixed on both sides inside the box body, a sliding plate slides on the slide rails, and a magnet is installed at the lower end of the sliding plate;

[0007] A support column is fixed at the upper end of the sliding plate, a push plate is fixed at the upper end of the support column, a rotating shaft rotates on the box body, a cam is fixed on the rotating shaft, the cam contacts the lower end of the push plate, and the cam is used to push the push plate upward. The rotating shaft penetrates the box body, and a rotating handle is fixed on the rotating shaft located outside the box body.

[0008] Further, a tension spring is installed on the slide rail. The tension spring is used to make the sliding plate tend to move upward. A locking spring is fixedly connected to the far rest angle of the cam, and the other end of the locking spring is fixedly connected to the top end of the box body.

[0009] Further, an isolation box is sleeved outside the box body. The material of the isolation box is ferritic stainless steel.

[0010] Further, an anti-collision plate is installed at the lower end of the box body.

[0011] Further, the material of the anti-collision plate is high-density polyethylene.

[0012] Further, the magnet uses a neodymium magnet.

[0013] Further, the material of the box body is aluminum-manganese alloy.

[0014] Further, a support column is fixed to the outside of the box body. A rotating ring is provided at the end of the support column. A rotating ball rotates inside the rotating ring. A retractable threaded part is provided at the upper opening of the rotating ring. A tightening nut is threadedly connected to the retractable threaded part. A fixing rod is installed at the upper end of the rotating ball. The fixing rod passes through the retractable threaded part and the nut.

[0015] Further, a counterweight ball is installed at the lower end of the rotating ball.

[0016] Further, an installation thread is provided at the upper end of the fixing rod. The fixing rod is used to connect with the corner reflector.

[0017] The present invention has the following beneficial effects compared with the prior art:

[0018] 1. A fixing device for a CR target reflector. This device is a fixing device for a CR target corner reflector dedicated to transmission towers. Since the transmission tower is made of iron, to achieve the effect of easy disassembly, the fixing method of this device uses a permanent magnet magnetic attraction for fixing. There is a neodymium magnet that can slide in the box body. When the neodymium magnet approaches the tower, it is magnetically attracted to the tower to complete the fixing. When the neodymium magnet is retracted into the center of the box body, the magnetic attraction is disconnected to achieve disassembly. Compared with the traditional bolt fixing, when this device is close to the installation point, pushing the turning handle can complete the installation. All the fixing devices are integrated together without the need to cooperate with bolts or other fixtures. Therefore, during construction, there is no need to carry an electric wrench, reducing the process of screwing bolts and greatly reducing the operation time at high altitude during the maintenance process.

[0019] 2. A set of cam magnet propulsion device is provided. Since the neodymium magnet has a strong magnetism, it is very difficult to disassemble the magnet by conventional methods. By rotating the cam, the linear motion is converted into circular motion, and by setting the turning handle to increase the force arm, the force required for disassembling the neodymium magnet is reduced.

[0020] 3. A set of vertical calibration structures is provided. The CR target corner reflector is equipped with an electronic compass and needs to maintain a horizontal attitude during installation. However, the transmission tower is tower-shaped, so it is impossible to ensure that all corner reflectors installed on the transmission tower are in a vertical state. By rotating the rotating ball in the rotating ring, the fixed rod is vertically positioned, thereby realizing the vertical installation of the corner reflector. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Structural schematic of the whole fixing device Figure Ⅰ ;

[0022] Figure 2 Structural schematic of the whole fixing device Figure Ⅱ ;

[0023] Figure 3 Exploded view of the box body and the isolation box in the fixing device;

[0024] Figure 4 Longitudinal section of the fixing device Figure Ⅰ ;

[0025] Figure 5 Longitudinal section of the fixing device Figure Ⅱ ;

[0026] Figure 6 Schematic diagram of the internal structure of the fixing device;

[0027] Figure 7 Schematic diagram of the structure of the vertical calibration device in the fixing device;

[0028] Figure 8 Schematic diagram of the vertical calibration device in the fixing device when the tightening nut is opened;

[0029] Figure 9 Longitudinal sectional view of the vertical calibration device in the fixing device;

[0030] Figure 10 Schematic diagram of the structure of the fixing device for installing the corner reflector.

[0031] In the figure: 101, box body; 102, slide rail; 103, sliding plate; 104, magnet; 201, support column; 202, push plate; 203, rotating shaft; 204, cam; 205, turning handle; 207, tension spring; 208, locking spring; 105, isolation box; 106, anti-collision plate; 301, support pillar; 302, rotating ring; 303, rotating ball; 304, retractable threaded part; 305, tightening nut; 306, fixed rod; 307, counterweight ball. DETAILED DESCRIPTION OF THE INVENTION

[0032] DETAILED DESCRIPTION OF THE INVENTION I: Refer to Figures 1-6As shown in the figure, a fixing device for a CR target reflector. This embodiment includes a box body 101, a slide rail 102, a sliding plate 103, and a magnet 104. Slide rails 102 are fixed on both sides inside the box body 101. A sliding plate 103 slides on the slide rails 102. A magnet 104 is installed at the lower end of the sliding plate 103.

[0033] A support column 201 is fixed to the upper end of the sliding plate 103. A push plate 202 is fixed to the upper end of the support column 201. A rotating shaft 203 is rotatably installed on the box body 101. A cam 204 is fixed to the rotating shaft 203. The cam 204 contacts the lower end of the push plate 202. The cam 204 is used to push the push plate 202 upward. The rotating shaft 203 penetrates the box body 101, and a rotating handle 205 is fixed to the rotating shaft 203 located outside the box body 101.

[0034] Specific embodiment two: Refer to Figures 1-3 As shown in the figure, an isolation box 105 is sleeved outside the box body 101 of this embodiment. The material of the isolation box 105 is ferritic stainless steel.

[0035] Specific embodiment three: Refer to Figures 1-4 As shown in the figure, an anti-collision plate 106 is installed at the lower end of the box body 101 of this embodiment.

[0036] Specific embodiment four: Refer to Figures 1-4 As shown in the figure, the material of the anti-collision plate 106 of this embodiment is high-density polyethylene.

[0037] Specific embodiment five: Refer to Figures 4-6 As shown in the figure, the magnet 104 of this embodiment uses a neodymium magnet.

[0038] Specific embodiment six: Refer to Figures 1-4 As shown in the figure, the material of the box body 101 of this embodiment is aluminum-manganese alloy.

[0039] Furthermore, the box body 101 is a hollow cuboid structure with an open lower end. The box body 101 and its internal parts are made of aluminum-manganese alloy, which is a non-magnetic material to prevent being attracted by the magnet. Cylindrical slide rails 102 are fixedly connected to the left and right sides of the inner wall of the box body 101 by bolts. A sliding plate 103 slides between the two slide rails 102. The slide rails 102 limit the movement of the sliding plate 103, enabling the sliding plate 103 to slide only vertically up and down. A magnet 104 for magnetic attraction with the tower is fixedly connected to the lower end of the sliding plate 103. An anti-collision plate 106 made of high-density polyethylene is fixedly connected to the open lower end of the box body 101. Since the magnetic attraction impact between the magnet 104 and the tower is relatively large instantaneously, in order to prevent the magnet 104 from being broken due to impact, the anti-collision plate 106 made of high-density polyethylene is installed as a buffer device. And the neodymium magnet has a relatively large magnetic force. If it is directly magnetically attracted to the iron tower, it will be difficult to disassemble, and iron filings will be adsorbed on the magnet 104. Therefore, the anti-collision plate 106 is set as a blocking device.

[0040] Further, a push plate 202 is fixed to the upper end of the sliding plate 103 through a support column 201. Two sets of cam mechanisms are symmetrically arranged in this device. Two rotating shafts 203 penetrate and are rotatably connected to the box body 101. The two rotating shafts 203 can be linked by gears, so that the two cams 204 can rotate synchronously. The lower end of the push plate 202 contacts the cam 204. The cam 204 is provided with a near rest angle and a far rest angle. A rotating handle 205 is fixed to the rotating shaft 203 located outside the box body 101. The rotating handle 205 is used to drive the cam 204 to rotate through the rotating shaft 203. When the rotating handle 205 rotates to the upper end, the near rest angle of the cam 204 contacts the push plate 202; when the rotating handle 205 rotates to the lower end, the far rest angle of the cam 204 contacts the push plate 202.

[0041] Specific embodiment seven: Refer to Figures 7-9 As shown, a tension spring 207 is installed on the slide rail 102 in this embodiment. The tension spring 207 is used to make the sliding plate 103 tend to move downward. The far rest angle of the cam 204 is fixedly connected with a locking spring 208, and the other end of the locking spring 208 is fixedly connected with the top end of the box body 101.

[0042] Further, a plurality of tension springs 207 are all sleeved on the slide rail 102 and are arranged between the lower fixed part of the slide rail 102 and the sliding plate 103, and are used to pull the sliding plate 103 downward, so that when in the non-engaged state, the sliding plate 103 and the push plate 202 tend to move downward and press against the cam 204. The locking spring 208 is used to pull the cam 204 to rotate, so that the far rest angle of the cam 204 has a tendency to rotate upward.

[0043] Further, in the non-magnetic adsorption state when not installed, the rotating handle 205 rotates to the lower end. At the same time, the far rest angle of the cam 204 abuts against the push plate 202, and the magnet 104 is located at the center of the box body 101; when installing, the anti-collision plate 106 of this device is closely attached to the transmission tower pole, and the rotating handle 205 is pulled upward. The rotating handle 205 drives the cam 204 to rotate until the near rest angle of the cam 204 contacts the push plate 202. The sliding plate 103 moves downward under the tension of the tension spring 207 until the magnet 104 is attracted to the transmission tower pole. At this time, this device is in the magnetic adsorption state; when it is necessary to disassemble, the rotating handle 205 is pushed downward. The rotating handle 205 drives the cam 204 to rotate. The far rest angle of the cam 204 pushes the push plate 202 upward, and then drives the magnet 104 to move upward and retract to the center of the box body 101 to separate from the transmission tower pole, completing the disassembly of the device. At this time, this device is in the non-magnetic adsorption state.

[0044] Furthermore, during transportation, the device is in a non-magnetic state. At this time, the handle 205 rotates downward, and the far repose angle of the cam 204 presses against the push plate 202, so that the magnet 104 remains in the box body 101 and the center position. However, vibration or squeezing of the handle 205 is inevitable during transportation. When the vibration or squeezing of the handle 205 causes the cam 204 to rotate, the far repose angle no longer presses upward against the push plate 202, causing the magnet 104 to lose its upward support and causing the device to be in a magnetic state and dangerous. To solve this problem, a locking spring 208 is provided. When the device is in a non-magnetic state, the locking spring 208 pulls the cam 204 to prevent the cam 204 from rotating. The far repose angle of the cam 204 is kept against the push plate 202, so that the device remains in a non-magnetic state. During the process of magnetic attraction with the iron tower after installation, since the attraction force of the neodymium magnet is much greater than the pulling force of the locking spring 208 on the cam 204, the pulling force of the locking spring 208 will not affect the strength of the magnetic attraction of the device.

[0045] Furthermore, the fixing method of the device adopts permanent magnet magnetic fixation. Compared with the traditional bolt fixation, the device can be installed by pushing the handle when it is close to the installation point, without the need to cooperate with bolts or other clamps. All fixing devices are integrated into one, and there is no need to carry an electric wrench, which reduces the process of rotating the bolts and greatly reduces the operation time at high altitude during maintenance. In addition, the device is provided with a set of cam magnet propulsion devices. Because the magnetism of neodymium magnets is strong, it is difficult to disassemble the magnets in conventional ways. By rotating the cam, the linear motion is converted into circular motion, and the lever arm is increased by setting the handle, thereby reducing the force required for disassembly of the neodymium magnet. The traditional magnetic fixing device needs to be disassembled by lifting, but when operating at high altitude on the iron tower, if the magnetic fixing device is disassembled by lifting, the moment the magnet separates from the iron tower will cause the construction personnel to lean back, and in severe cases, there will be a risk of falling. The device adopts a mechanical structure, and the lifting action during disassembly is replaced by pressing, which eliminates the backward leaning caused by the construction personnel being unable to retract the force when disassembling the magnetic fixing device, greatly improving the construction safety.

[0046] Specific implementation method eight: See Figures 7-10 As shown, a pillar 301 is fixed to the outer side of the box body 101 described in this embodiment, a rotating ring 302 is provided at the end of the pillar 301, a rotating ball 303 rotates inside the rotating ring 302, a retractable threaded portion 304 is provided at the upper opening of the rotating ring 302, a tightening nut 305 is threadedly connected to the retractable threaded portion 304, a fixing rod 306 is installed on the upper end of the rotating ball 303, and the fixing rod 306 passes through the retractable threaded portion 304 and the tightening nut 305.

[0047] Specific implementation method nine: See Figures 7-10As shown, a counterweight ball 307 is installed at the lower end of the rotating ball 303 in this embodiment.

[0048] Furthermore, the support column 301 can be installed on the side wall and the top end of the box body 101. The inner cavity of the rotating ring 302 is a spherical ring structure. The diameter of the inner cavity circle of the rotating ring 302 is the same as that of the rotating ball 303. A contractible threaded part 304 is provided at the upper end of the rotating ring 302. The contractible threaded part 304 is annular, with threads provided on its outer side, and a plurality of contractible shrinkage grooves are circumferentially provided on the contractible threaded part 304. The shrinkage grooves extend to the middle part of the rotating ring 302. The shrinkage grooves can make the contractible threaded part 304 and the rotating ring 302 open and lock at a small angle. The opening of the rotating ring 302 facilitates the installation of the rotating ball 303 into the rotating ring 302 and enables the rotating ball 303 to rotate freely; the locking of the rotating ring 302 is used to fix the rotating ball 303. The connection part between the counterweight ball 307 and the rotating ball 303 is a rod-like structure. The rod-like structure for connecting the counterweight ball 307 and the rotating ball 303 passes through the lower opening of the rotating ring 302 and can swing at the lower opening of the rotating ring 302; the fixing rod 306 passes through the upper opening of the rotating ring 302 and can swing at the upper opening of the rotating ring 302. The counterweight ball 307 and the rotating ball 303 are connected by threads. During installation, first embed the rotating ball 303 into the rotating ring 302, and then screw the counterweight ball 307 into the threaded part at the lower end of the rotating ball 303.

[0049] Specific Embodiment Ten: Refer to Figures 7-10 As shown, an installation thread is provided at the upper end of the fixing rod 306 in this embodiment. The fixing rod 306 is used to connect with the corner reflector.

[0050] Furthermore, since this device is used to install the corner reflector, and the corner reflector needs to maintain a specific elevation angle posture during installation. If the elevation angle of the corner reflector is adjusted after it is fixed, it will inevitably increase the workload of high-altitude operation. Therefore, when installing the corner reflector, first set the corner reflector to a fixed angle, and then install it at a horizontal erection site. Furthermore, this structure is set to achieve the function of vertical calibration of the installation point. The tightening nut 305 is threadedly connected to the contractible threaded part 304. The thread diameter inside the tightening nut 305 shows a decreasing trend from bottom to top. When the tightening nut 305 is completely unscrewed from the contractible threaded part 304, the contractible threaded part 304 and the shrinkage grooves on the rotating ring 302 open at a small angle to facilitate the installation of the rotating ball 303; when the tightening nut 305 rotates to the middle section of the contractible threaded part 304, the tightening nut 305 can be installed on the contractible threaded part 304 and the rotating ball 303 can rotate freely; when the tightening nut 305 is completely locked with the contractible threaded part 304, the gap of the shrinkage grooves on the contractible threaded part 304 decreases, and the rotating ring 302 holds the rotating ball 303 tightly to achieve the fixation of the rotating ball 303.

[0051] During use, loosen the tightening nut 305 to allow the counterweight ball 307 to hang naturally until the counterweight ball 307 stops shaking. Then, tighten the tightening nut 305 to fix the fixing rod 306 in a vertical state.

Claims

1. A fixing device for a CR target reflector, characterized in that: It includes a box body (101), slide rails (102), a sliding plate (103) and a magnet (104). Slide rails (102) are fixed on both sides inside the box body (101). A sliding plate (103) slides on the slide rails (102), and a magnet (104) is installed at the lower end of the sliding plate (103). A support column (201) is fixed at the upper end of the sliding plate (103), and a push plate (202) is fixed at the upper end of the support column (201). A rotating shaft (203) rotates on the box body (101), and a cam (204) is fixed on the rotating shaft (203). The cam (204) contacts the lower end of the push plate (202). The cam (204) is used to push the push plate (202) to move upward. The rotating shaft (203) penetrates the box body (101), and a rotating handle (205) is fixed on the rotating shaft (203) located outside the box body (101). A tension spring (207) is installed on the slide rail (102). The tension spring (207) is used to make the sliding plate (103) tend to move downward. A locking spring (208) is fixedly connected to the far rest angle of the cam (204), and the other end of the locking spring (208) is fixedly connected to the top end of the box body (101). A support column (301) is fixed on the outside of the box body (101). A rotating ring (302) is provided at the end of the support column (301). A rotating ball (303) rotates inside the rotating ring (302). A fixing rod (306) is installed at the upper end of the rotating ball (303). The fixing rod (306) is used to connect with a corner reflector, and a counterweight ball (307) is installed at the lower end of the rotating ball (303).

2. The fixing device for the CR target reflector according to claim 1, characterized in that: An isolation box (105) is sleeved on the outside of the box body (101), and the material of the isolation box (105) is ferritic stainless steel.

3. The fixing device for the CR target reflector according to claim 1, characterized in that: An anti-collision plate (106) is installed at the lower end of the box body (101).

4. The fixing device for the CR target reflector according to claim 3, characterized in that: The material of the anti-collision plate (106) is high-density polyethylene.

5. The fixing device for the CR target reflector according to claim 1, characterized in that: The magnet (104) is a neodymium magnet.

6. The fixing device for a CR target reflector according to claim 1, characterized in that: The material of the box body (101) is aluminum-manganese alloy.

7. The fixing device for the CR target reflector according to claim 1, characterized in that: A contractible threaded part (304) is provided at the upper opening of the rotating ring (302). A tightening nut (305) is threadedly connected to the contractible threaded part (304). The fixing rod (306) passes through the contractible threaded part (304) and the tightening nut (305).

8. The fixing device for a CR target reflector according to claim 7, characterized in that: The upper end of the fixing rod (306) is provided with installation threads.

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